1974 1.8L engine fast idle then stalls, Fuel injection issues Options

[tshih914]

My 1.8L 914-4 with stock Bosch L?-Jetronic FI after being stored several years started to develop a hard to start problem. When finally started would stall when I give the gas pedal any input to raise the revs. I suspect there was some kind of intake air leak and while fiddling around had a backfire which blew the AF meter which I had Pelicanparts repaired. After replacing the fuel lines with the stainless ones from Tangerine Racing and flushing out the fuel system with Techron the engine started to run normally for a short time. Now the engine can be started and fast idles at 3000 rpm but again any input to rev up the engine results in stalling. The idle adjustment screw at the base of the throttle housing is fully closed. Any suggestions on how to fix?

[Van B]

Check to make sure your AFM is plugged in first.

[wonkipop]

Check to make sure your AFM is plugged in first.

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sort of sounds like its not connected maybe?
moving throttle plate takes throttle position switch off idle position and hands off to AFM.
except AFM might not be there.

check that first.
then troubleshooting step by step can commence.
sounds like this problem was already there before you had unfortunate backfire and wrecked the AFM. kind of pointing at maybe a problem in the harness? or somewhere in the hand off between the TPS and the AFM.
anyway its got to be done methodically.


fast idle is likely a separate problem. maybe.
one step at a time.
save that for later.

what 1.8. 74 or 75?